MVC architecture

Oct 31, 2012Download as PPTX, PDF1 like1,116 views

baabtra.com - No. 1 supplier of quality freshers

This document provides an overview of the MVC architecture pattern. It defines the core components of MVC - the model, view, and controller. The model manages the application's data and logic. The view displays the UI. The controller handles user input and interaction and selects views. MVC promotes separation of concerns, testability, and parallel development. It allows full control over an application's behavior and supports test-driven development well.

Disclaimer: This presentation is prepared by trainees of baabtra as a part of
mentoring program. This is not official document of baabtra – Mentoring Partner
baabtra – Mentoring Partner is the mentoring division of baabte System Technologies Pvt. Ltd

What is MVC?
• The Model-View-Controller (MVC) architectural
pattern separates an application into three main
components:
1. Model
2. View
3. Controller.
The ASP.NET MVC framework provides an
alternative to the ASP.NET Web Forms pattern for
creating MVC-based Web applications.

Model

• Model objects are the parts of the application that
implement the logic for the applications data
domain.
• Often, model objects retrieve and store model state
in a database.
• In small applications, the model is often a conceptual
separation instead of a physical one.

• MVC model is basically a C# or VB.NET class
• A model is accessible by both controller and view
• A Controller can be used to pass data from
model to view
• A view can use model to display data in page.

View

• Views are the components that display the
application’s user interface (UI). Typically, this UI is
created from the model data.
• An example would be an edit view of a Products
table that displays text boxes, drop-down lists, and
check boxes based on the current state of a Products
object.

• View is an ASPX page without having a code behind
file
• All page specific HTML generation and formatting can
be done inside view
• One can use Inline code (server tags ) to develop
dynamic pages
• A request to view (ASPX page) can be made only
from a controller’s action method.

Controller

• Controllers are the components that handle user
interaction, work with the model, and ultimately
select a view to render that displays UI.
• In an MVC application, the view only displays
information; the controller handles and responds to
user input and interaction.

• Controller is basically a C# or VB.NET class which
inherits system.mvc.controller
• Controller is a heart of the entire MVC architecture
• Inside Controller’s class action methods can be
implemented which are responsible for responding
to browser OR calling views.
• Controller can access and use model class to pass
data to views
• Controller uses ViewData to pass any data to view

Test-Driven Development
• The MVC pattern makes it easier to test applications
than it is to test a Web Forms-based ASP.NET Web
application.
• Tests for Web Forms-based ASP.NET applications can
therefore be more difficult to implement than tests
in an MVC application
• Tests in a Web Forms-based ASP.NET application
require a Web server.

• The MVC framework decouples the components and
makes heavy use of interfaces, which makes it
possible to test individual components in isolation
from the rest of the framework.
• MVC application also promotes parallel
development.
• one developer can work on the view, a second
developer can work on the controller logic, and a
third developer can focus on the business logic in the
model.

Advantages of an MVC-Based Web
Application
• It makes it easier to manage complexity by dividing
an application into the model, the view, and the
controller.
• It does not use view state or server-based forms. This
makes the MVC framework ideal for developers who
want full control over the behavior of an application.
• It provides better support for test-driven
development (TDD)

• It works well for Web applications that are supported
by large teams of developers and Web designers who
need a high degree of control over the application
behavior

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